Birds leave their nests in the early morning and return at dusk. What does it mean?

This is a poem by Tagore. Readers have different experiences and will have different feelings.

The dim light at dusk and the silent bird's nest can be understood as a chaotic and dim era, or as the twilight time of the elderly. Birds in the morning can be new things and new energy, their songs can be hope, or they can actually refer to young people.